{"id":"CVE-2026-98524","title":"kernel: rds: ib: Clear the sg list when mapping an MR fails (CVE-2026-98524)","summary":"A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) subsystem. When memory region mapping fails during InfiniBand operations, the kernel can retain a stale reference to memory buffers that have already been released. A l…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Linux","affected":["Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < 1be3211e6ac77adbb1eac01314d989d243b32c59","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < c42d316163f89cd23de2f3e24558177a8c29bad8","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < 8dca3c81344532a7f05edb3d12f31f3009410a90","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < 49ba5ed0129906e0362c2e4b5e21c89b2a41e115","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < 4468df5bcdef959fd96494e9968f323561a45f4c","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < e2ee0616260080376123997488b5cf8a3870b8d9","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < b36d32f30c3f1e58e3a5ae79d0f52836a316b36e","Linux >= 1659185fb4d0025835eb2058a141f0746c5cab00 < 58eb1b3325edac42dc6df72c80962bd53a3c8ca7","Linux 4.6"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:22:48+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98524.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98524.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98524"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555039"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98524"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98524"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98524.mbox"},{"url":"https://git.kernel.org/stable/c/1be3211e6ac77adbb1eac01314d989d243b32c59"},{"url":"https://git.kernel.org/stable/c/c42d316163f89cd23de2f3e24558177a8c29bad8"},{"url":"https://git.kernel.org/stable/c/8dca3c81344532a7f05edb3d12f31f3009410a90"},{"url":"https://git.kernel.org/stable/c/49ba5ed0129906e0362c2e4b5e21c89b2a41e115"},{"url":"https://git.kernel.org/stable/c/4468df5bcdef959fd96494e9968f323561a45f4c"},{"url":"https://git.kernel.org/stable/c/e2ee0616260080376123997488b5cf8a3870b8d9"},{"url":"https://git.kernel.org/stable/c/b36d32f30c3f1e58e3a5ae79d0f52836a316b36e"},{"url":"https://git.kernel.org/stable/c/58eb1b3325edac42dc6df72c80962bd53a3c8ca7"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00171,"epssPercentile":0.06466,"ingestedAt":"2026-10-18T15:45:12.281Z","slug":"CVE-2026-98524","body":"## Overview\n\nA flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) subsystem. When memory region mapping fails during InfiniBand operations, the kernel can retain a stale reference to memory buffers that have already been released. A local attacker could exploit this flaw to trigger a use-after-free condition, potentially leading to local privilege escalation or a denial of service through a system crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98524.json)\n\n**kernel: rds: ib: Clear the sg list when mapping an MR fails** — rated Important by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228938,"id":"CVE-2026-98524","ts":1792854115623,"field":"cvss","old":null,"new":"7.8"},{"seq":228937,"id":"CVE-2026-98524","ts":1792854115623,"field":"severity","old":"none","new":"high"}]}